The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 27, 1977
Filed:
Dec. 03, 1976
Applicant:
Inventors:
Marvin C Echols, Houston, TX (US);
David L Gruller, Houston, TX (US);
Assignee:
Zap-Lok Systems International, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23P / ; B23P / ;
U.S. Cl.
CPC ...
29458 ; 29525 ; 285 55 ; 285374 ;
Abstract
Mechanical pipe joints of the pin and bell variety, and methods of forming same, wherein the ends are pre-formed so as to permit a controlled interference fit upon joining and preferably provide a double seal against both internal and external pressure, the joints being particularly adapted for field-grade materials, aluminum members, and internally and externally coated members and being readily disengagable and re-formable without producing galling.